Climatological Report (Daily)
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CDUS43 KLOT 280633
CLIORD


CLIMATE REPORT
NATIONAL WEATHER SERVICE CHICAGO IL
1233 AM CST SUN DEC 28 2014


...................................

...THE CHICAGO-OHARE CLIMATE SUMMARY FOR DECEMBER 27 2014...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1871 TO 2014


WEATHER ITEM   OBSERVED TIME   RECORD YEAR NORMAL DEPARTURE LAST
                VALUE   (LST)  VALUE       VALUE  FROM      YEAR
                                                  NORMAL
..................................................................
TEMPERATURE (F)
 YESTERDAY
  MAXIMUM         49   1027 AM  61    2008  32     17       41
                                      1982
  MINIMUM         31   1159 PM -10    1950  18     13       21
                                      1886
  AVERAGE         40                        25     15       31

PRECIPITATION (IN)
  YESTERDAY        T             1.74 2008   0.06  -0.06     0.00
  MONTH TO DATE    0.79                      2.01  -1.22     1.59
  SINCE DEC 1      0.79                      2.01  -1.22     1.59
  SINCE JAN 1     39.47                     36.65   2.82    41.74

SNOWFALL (IN)
  YESTERDAY        0.0          10.1  1894   0.3   -0.3      0.0
  MONTH TO DATE    T                         6.9   -6.9     10.7
  SINCE DEC 1      T                         6.9   -6.9     10.7
  SINCE JUL 1      2.9                       8.3   -5.4     11.6
  SNOW DEPTH       0

DEGREE DAYS
 HEATING
  YESTERDAY       25                        40    -15       34
  MONTH TO DATE  835                       993   -158     1105
  SINCE DEC 1    835                       993   -158     1105
  SINCE JUL 1   2278                      2249     29     2388

 COOLING
  YESTERDAY        0                         0      0        0
  MONTH TO DATE    0                         0      0        0
  SINCE DEC 1      0                         0      0        0
  SINCE JAN 1    799                       843    -44      933
..................................................................


WIND (MPH)
  HIGHEST WIND SPEED    31   HIGHEST WIND DIRECTION     W (270)
  HIGHEST GUST SPEED    39   HIGHEST GUST DIRECTION     W (270)
  AVERAGE WIND SPEED    15.2


SKY COVER
  POSSIBLE SUNSHINE  MM
  AVERAGE SKY COVER 1.0


WEATHER CONDITIONS
 THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
  LIGHT RAIN
  FOG


RELATIVE HUMIDITY (PERCENT)
 HIGHEST    93           600 AM
 LOWEST     69           800 PM
 AVERAGE    81

..........................................................


THE CHICAGO-OHARE CLIMATE NORMALS FOR TODAY
                         NORMAL    RECORD    YEAR
 MAXIMUM TEMPERATURE (F)   32        69      1984
 MINIMUM TEMPERATURE (F)   18       -13      1924


SUNRISE AND SUNSET
DECEMBER 28 2014......SUNRISE   719 AM CST   SUNSET   428 PM CST
DECEMBER 29 2014......SUNRISE   719 AM CST   SUNSET   428 PM CST


-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.




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